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This study examines the effectiveness of integrating Islamic themes into English teaching materials for non-English major students at Universitas Muhammadiyah Enrekang. Using a Content and Language Integrated Learning (CLIL) approach, this research developed an English textbook that includes Islamic values, aiming to enhance students' language skills while connecting with their religious backgrounds. The study employed the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation) to create and test the textbook. Results from a sample of 189 students show high effectiveness, with a mean N-Gain Score of 0.7601 and an N-Gain Percentage of 76.01%, indicating significant improvement in students' English proficiency. The findings reveal that materials with religious values not only improve language skills but also boost student motivation and engagement. This approach fosters an inclusive learning environment that aligns with students’ identities, supporting both their academic growth and ethical development. This research suggests that integrating religious values into language education can create meaningful and impactful learning experiences in English language teaching.